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Drupal is an open source content management system written in PHP, originally developed by Dries Buytaert.

phpBB is an open source discussion forum system written in PHP, originally developed by James Atkinson.

MediaWiki is an open source wiki-style content management system written in PHP, originally developed for Wikipedia by Lee Daniel Crocker.

PHP is a scripting language for creating websites.

JavaScript is a lightweight, object-oriented, cross-platform scripting language, often used within web pages.

Prototype is a JavaScript framework originally developed by Sam Stephenson.

Script.aculo.us is a JavaScript library based on the Prototype JavaScript framework, originally developed by Thomas Fuchs.

jQuery is a JavaScript library that simplifies HTML document traversing, event handling, animating and Ajax interaction. Originally developed by John Resig.

Bootstrap is an open source HTML, CSS, and JavaScript framework.

The Apache HTTP Server is an open source web server by the Apache Software Foundation.

Nginx (pronounced as "engine X") is a lightweight open source web server developed by Igor Sysoev.

Hetzner is a German web hosting provider.

PhoenixNAP is a US-based IT service provider offering web hosting.

Hetzner is a German web hosting provider.

PhoenixNAP is a US-based IT service provider offering web hosting.

Cloudflare provides a content delivery network.

Amazon is a US-based e-commerce and cloud computing provider.

Sectigo (formerly Comodo CA) is a US-based SSL certificate authority.

Let’s Encrypt is a free, automated, and open certificate authority provided by the Internet Security Research Group.

External Cascading Style Sheets define style rules in a separate CSS file.

Embedded Cascading Style Sheets define a set of style rules in a <style> element within a web page.

Inline Cascading Style Sheets define style rules directly within an (X)HTML element using the style attribute.

Persistent cookies with an expiration time between 1 month and 1 year.

HttpOnly cookies are used only in the HTTP protocol and not in client side scripts, which may increase security.

Non-secure cookies may be used via an unencrypted connections, which may be a security threat.

Gzip (GNU zip) is a file compression algorithm.

A strong ETag is an HTTP header field for validation of cached web pages, that indicates a byte-for-byte identical page in the cache.

The Internet Protocol version 6 (IPv6) provides amongst others a vastly larger address space than the preceding version 4. We consider a website to support IPv6 if a 128-bit address is assigned to it, regardless of the content delivered at that address.

The websites redirects visitors to its www subdomain, e.g. from example.com to www.example.com.

Microdata is a specification to integrate metadata within existing content on web pages.

HTML5 is the fifth revision of the HTML standard.

UTF-8 (8-bit Unicode Transformation Format) is a variable-length character encoding for Unicode, which is backwards compatible with ASCII.

PNG (Portable Network Graphics) is a lossless compression image format, suitable to store graphics with uniformly colored areas, and originally introduced as a free, open-source successor of GIF.

JPEG (Joint Photographic Experts Group) is a lossy compression method suitable to store photographic images.

GIF (Graphics Interchange Format) is a lossless compression image format, originally introduced by CompuServe and suitable to store graphics, logos and simple animations.

Scalable Vector Graphics (SVG) is an XML-based vector image format.

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